On the first three rows, the red rectangles should show on the left from
0 to 1s. From 1 to 2s, the rectangles should show on the right. Then
the rectangles should show on the left from 2 to 4s, then on the right
again from 4 to 5s and come back to the left position and stay there
after 5s.

On the fourth row, the rectangle's begin condition is event based
and requires a user click. After the user clicks on the rectangle,
the rectangle should move to the right position for 1s, then move
back to the left position for 3 seconds, move again to the right
position for 1 second before going back to the left position.

On the fifth row, the rectangle's begin condition is accessKey based
and requires a user to press the 'a' key. After the user presses that key
the rectangle should move to the right position for 1s, then move
back to the left position for 3 seconds, move again to the right
position for 1 second before going back to the left position.

The last row's rectangle has a begin condition with two offset values
(1s;4s) and should behave like the rectangles of the first three
rows for the first 5 seconds of the document's timeline. In addition,
the begin condition has a click event base and thus, the rectangle
should move to the right position for one second every time the user
clicks on it. Finally, the begin condition also has an accessKey condition
for the 'b' character. Thus, the rectangle should move to the right
position every time the user presses the 'b' key.